React Preparation Pack

Master functional components, hooks lifecycle, reconciliation, virtual DOM internals, and state synchronization.

Question Cards (9)

Card #1easy

What is the Virtual DOM and how does React use it to render pages?

ReactDOM
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Card #2medium

Explain the difference between useEffect hooks and useLayoutEffect hooks.

React HooksLifecycles
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Card #3easy

What is the Virtual DOM in React?

ReactVirtual DOM
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Card #4easy

What is the difference between State and Props in React?

ReactProps
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Card #5medium

What are React Hooks?

React HooksuseState
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Card #6medium

What is useEffect and when should you use it?

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Card #7medium

What is React Context API?

React ContextGlobal State
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Card #8hard

What is the difference between useMemo and useCallback?

React PerformanceuseMemo
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Card #9hard

How does React Reconciliation work?

React ReconciliationVirtual DOM
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Frequently Asked Questions

What is the primary role of React?

React is a component-based frontend library for building highly interactive user interfaces.

Is React 19 backward compatible?

Yes, React 19 keeps backward compatibility for class components while introducing automated compilers.

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